/Engine/Plugins/Runtime/GeometryProcessing/Source/DynamicMesh/Public/Operations/SelectiveTessellate.h
Tessellate the triangle patch by generating new vertices inside the triangle. Compute the barycentric coordinates of the new vertices and store them in the TriPatch.BaryCoord. Using the vertices generated in the edge patches and inside the triangle patch, generate new triangles and store the result in the TriPatch.Triangles.
void TessellateTriPatch ( [TrianglePatch](API\Plugins\DynamicMesh\Operations\FTessellationPattern\TrianglePatch) & TriPatch ) const